EP1012906A1 - Ebene mikrowellenantenne - Google Patents
Ebene mikrowellenantenneInfo
- Publication number
- EP1012906A1 EP1012906A1 EP98934748A EP98934748A EP1012906A1 EP 1012906 A1 EP1012906 A1 EP 1012906A1 EP 98934748 A EP98934748 A EP 98934748A EP 98934748 A EP98934748 A EP 98934748A EP 1012906 A1 EP1012906 A1 EP 1012906A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plane
- antenna
- individual
- microwave antenna
- antenna according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims description 13
- 230000010287 polarization Effects 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000010363 phase shift Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 101710195281 Chlorophyll a-b binding protein Proteins 0.000 description 1
- 101710143415 Chlorophyll a-b binding protein 1, chloroplastic Proteins 0.000 description 1
- 101710181042 Chlorophyll a-b binding protein 1A, chloroplastic Proteins 0.000 description 1
- 101710091905 Chlorophyll a-b binding protein 2, chloroplastic Proteins 0.000 description 1
- 101710095244 Chlorophyll a-b binding protein 3, chloroplastic Proteins 0.000 description 1
- 101710127489 Chlorophyll a-b binding protein of LHCII type 1 Proteins 0.000 description 1
- 101710184917 Chlorophyll a-b binding protein of LHCII type I, chloroplastic Proteins 0.000 description 1
- 101710102593 Chlorophyll a-b binding protein, chloroplastic Proteins 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Definitions
- the invention relates to a microwave antenna with individual antenna elements linked to one another via lines of defined length, which are arranged above a ground plane.
- the invention relates in particular to a plane microwave antenna of the generic type, a displaceable plane (setting plane) being arranged adjacent to the plane in which the individual antenna elements are arranged, which carries means for phase-shifting those from the lines individual signals.
- the generic antennas can be both transmit and receive antennas.
- Level microwave antennas of the generic type are known in the prior art, for example the flat antenna A60-F from the Blau Vietnamese brand.
- Such flat microwave antennas are primarily intended to replace the so-called "satellite dishes", which have become very popular in recent years, but whose external appearance often triggers criticism because it aesthetically disturbs the external appearance of buildings and landscapes intervenes.
- the known flat antennas - like the already mentioned parabolic antennas - have to be aligned with respect to two degrees of freedom to the respective satellite to be received in order to provide acceptable signal-to-noise ratios of the antenna signal.
- the two degrees of freedom are usually referred to as “elevation” and "azimuth", the elevation corresponding to an angle 0 which lies between the main lobe direction of the main antenna plane and the azimuth ⁇ characterizes the rotation of the entire arrangement about a vertical axis.
- elevation and “azimuth”
- the elevation corresponding to an angle 0 which lies between the main lobe direction of the main antenna plane and the azimuth ⁇ characterizes the rotation of the entire arrangement about a vertical axis.
- other angle designations can also be selected.
- All planar antennas (planar antennas) previously offered can only receive in the direction of incidence perpendicular to their base area. Mechanical alignment is therefore also necessary.
- a flat microwave antenna is known from EP 0 456 579 A1, in which the main lobe direction can be set without pivoting the main plane.
- at least one setting level is provided, on which wedge-shaped means are provided, in order to apply a defined phase delay to the respective lines, which originate from the individual antenna elements. In this way it can be achieved that the angle ⁇ which is formed between the main lobe direction and the base plane of the planar antenna can deviate from 90 °.
- the only way to create such an antenna is to pivot the main lobe direction in one plane, the angle between the main lobe direction and the base area of the antennas being 90 ° in classic flat antennas acute or an obtuse angle can be changed, but the main lobe direction is always in the plane spanned by the vertical axis and the direction of increasing or decreasing phase offset of the individual signals.
- EP 0 456 579 A1 provides for two adjustment planes arranged at right angles to one another, so that phase shifts of the individual signals in two perpendicular directions are made possible.
- planar antenna with adjustable directional characteristic known from the European open-up specification has some disadvantages which severely restrict its practical applicability.
- the means which are to have a phase-shifting effect on the individual lines extend at right angles to the lines, the wedge-shaped design of the phase-shifting elements disclosed in the laid-open publication requiring a certain thickness of the setting level and offering manufacturing problems .
- the invention is therefore based on the first object of improving an antenna of the special type based on the prior art in the form of EP 0 456 579 A1 so that the phase-shifting elements are easier to manufacture on the setting level and are less susceptible to mechanical interference.
- the solution to the problem is characterized in a generic flat microwave antenna in that the lines are each interrupted, that each interruption point is assigned an essentially U-shaped conductor section arranged on the displaceable level, the active length of which can be changed by shifting the setting level. Due to the intended interruption of the lines, the essentially U-shaped conductor section assigned to each interruption point acts as a variable pull-out line, as a result of which the transit time of the signal and thus its phase position can be influenced.
- the phase shifters / delay elements provided according to the invention on the setting level can be arranged on the setting level in various manufacturing techniques or conductor techniques. These include microstrip lines, triplate lines or strip lines, suspended substrate lines, slot lines, coplanar lines, coplanar strip lines.
- the setting plane is particularly preferably arranged between the ground plane and the plane of the individual antenna elements.
- the U-shaped conductor sections can be coupled galvanically or else mixed inductively / capacitively.
- the angle between the main lobe direction and the main antenna plane can be set, the setting plane preferably being in the form of a film, on the edges of which traction means act.
- These traction means can, for example, be screws arranged opposite one another, with which the setting plane in the form of the film can each be moved in one direction.
- an inventive development of the plane microwave antenna according to the invention is characterized in that the antenna plane is rotatably mounted, and thus an angle ⁇ about the vertical axis can also be set.
- planar antenna according to EP 0 456 579 AI which represents the special generic state of the art, that the planar antenna according to the prior art is only suitable for the polarization types left circular (LHCP) and right circular (RHCP).
- the invention is therefore based on the further object of providing a planar microwave antenna which is suitable for any type of polarization.
- the solution to the problem is in a microwave antenna with individual antenna elements linked to one another via lines of defined length, which are arranged above a ground plane, characterized by a double-shell structure, each shell having at least one plane containing individual antenna elements and the preferred direction of the individual antenna elements of the first shell runs at right angles to the preferred direction of the individual antenna elements of the second shell.
- the summed signals of the first and the second shell are each routed to one of two coupling-out contacts, which are arranged offset from one another by an angle of ⁇ / 2 in a circular cutout, and that a in the circular cutout rotatably mounted waveguide with a circular cross-section has two corresponding coupling contacts arranged offset by ⁇ c / 2.
- the solution according to the invention can be used particularly advantageously with the microwave antenna with adjustable directional characteristic proposed according to the invention, in which exactly one displaceable plane with essentially U-shaped conductor sections is arranged as phase-shifting elements on a rotatable main plane, so that the main lobe direction tion can be set with little effort.
- the combination of the two measures creates an antenna which is suitable, for example, for satellite reception and communication and other applications, the antenna being inconspicuously parallel to any surface, for example a house wall, a gable wall and others, and good signal-to-noise ratio of the antenna signal with any type of polarization.
- FIG. 1 shows a schematic representation of the setting options for the direction of the main lobe in the case of a flat antenna according to the invention
- FIG. 2 shows a schematic perspective illustration of the layer structure of a flat antenna according to the invention
- FIG. 3 the layer structure according to FIG. 2, as an exploded drawing
- FIG. 4 shows a perspective schematic representation of the two shells with antenna elements arranged offset from one another by ⁇ / 2,
- FIG. 5 the view according to Figure 4 in plan view, the coupling contacts of a central waveguide are shown in a first position
- FIG. 6 the illustration according to FIG. 5, the coupling-out locations being offset in order to make another polarization plane receivable
- Figure 7 - a schematic representation of a possible
- Figure 8 Examples of binary tree structures and arrangement of phase-shifting elements with different square numbers of individual antenna elements.
- FIG. 1 shows a schematic illustration of the degrees of freedom provided according to the invention for aligning the main lobe of a planar antenna 10 according to the invention.
- the planar antenna 10 according to the invention has, for example, 10 ⁇ 10 individual antenna elements, which are only indicated by a circle 12 in FIG. 1.
- the edge of the antenna surface can - as indicated in Figure 1 - for example rectangular, i.e. following the matrix of 10 x 10 individual antenna elements - be formed or, in order to enable the preferred rotation about the vertical axis - Z axis - to have a circular edge.
- a defined phase shift can be imparted to all individual antenna elements of the same coordinate in the direction of the X ′ axis, as is symbolized by the triangle 14. In this way it can be achieved that, despite an angle of incidence deviating from the vertical by an angle f), all the individual signals of the individual antenna elements appear in phase at the summation point.
- the entire antenna arrangement can be pivoted about the vertical axis, ie the Z axis, so that the X ′ axis can be pivoted by an angle ⁇ to the X axis.
- the angle ⁇ can be an azimuth, for example.
- the very simple concept provided according to the invention enables inexpensive antennas which can be arranged in any position on building walls, and in particular parallel to a building wall, the direction of the main lobe nevertheless being freely orientable in the room.
- FIG. 2 shows the structure of a planar antenna provided according to the invention
- Figure 3 the layers shown in Figure 2 are shown as an exploded view.
- a two-shell structure is provided in order to evaluate two polarization components that are orthogonal to one another and thus to be able to set any type of polarization.
- the layers belonging to an upper shell are provided with 20's reference symbols, while the layers belonging to a lower shell have 30s reference symbols.
- a metal layer 20 can first be seen from top to bottom, which is applied to a carrier material 22, which is referred to below as "superstrate 22".
- Figure 3 shows that the metal layer 20 carries 2 x 2 circular cutouts 21. Each circular section is part of a single antenna element.
- the representation of a 2 ⁇ 2 matrix of individual antenna elements has been chosen in order to enable an easy to understand representation. In actual embodiments of the antenna according to the invention, the matrices of individual antenna elements will have to be chosen to be significantly larger, in particular to receive a sufficiently strong overall signal when receiving satellite signals.
- a film 24 is arranged under the superstrate 22 and can be moved in the direction of the arrows in FIG. 3.
- U-shaped conductor sections 25a and 25b are arranged on the film 24, the function of which becomes clear when the next layer, the substrate 26, is viewed.
- the substrate 26 carries a network structure with individual antenna elements 27, which are all aligned in one direction parallel to one another. Lines, which are interrupted at two points 28a and 28b, depart from the individual antenna elements 27, which interact with the corresponding circular sections 21 in the metal layer 20. These interruption points are bridged by the U-shaped conductor pieces 25a and 25b, the effective length of the U-shaped “pull-out lines” 25a and 25b being able to be changed by the position of the film 24. If the film 24 shown in FIG.
- the individual antenna elements 37 which each interact with the cutouts 31 in the metal layer 30, are facing in an orthogonally extending direction the first-mentioned individual antenna elements 27 aligned.
- the outcoupling contact 39 likewise extends at an angle of ⁇ / 2 to the outcoupling contact 29.
- the bottom layer 40 shows the base plane 40, a circular waveguide 42 which, according to the invention, can be rotated relative to the base plane 40 and which interacts with the coupling contact 29 and 39 of the two shells, which are offset by ⁇ / 2 from one another.
- FIG 4 four individual antenna elements each of the upper and the lower shell are shown in perspective one above the other. It can be seen that the individual antenna elements 27 and 37 assigned to one another are arranged under mutually perpendicular polarization directions. It can also be seen that the projections of the coupling-out contacts 29 and 39 of the upper and lower shell are arranged at an angle of ⁇ / 2 to one another; one can also see the rotatably arranged circular waveguide 42 with which the total signal is coupled out.
- Figure 5 shows the representation according to Figure 4 in the form of a projection, the direction of projection parallel to the vertical axis, i.e. Z axis runs.
- the planes of the first and second shells spaced apart from one another in space therefore appear to be fused together in the plan view in FIG. 5.
- FIG. 5 also shows two outcoupling contacts 49 arranged on the circular waveguide 42, which are spaced apart by ⁇ / 2, as well as the outcoupling contacts 29 of the upper shell and 39 of the lower shell.
- the signal of the vertically polarized wave component (with respect to the view) can be coupled out at the decoupling contact shown vertically. Accordingly, the signal of the horizontally polarized well component is available at the other coupling-out contact 49.
- any desired plane of polarization can accordingly be set by rotating the circular waveguide 42.
- the signals supplied by the two shells are connected to one another with the interposition of a 90 ° phase shifter, a circularly polarized signal can also be processed with the planar antenna according to the invention, since circularly polarized waves can be composed of any two orthogonal linear wave components. If the decoupling contacts on the circular waveguide connection are connected in such a way that they result in circular polarization, the rotation or the angle to the main plane of the antenna is irrelevant.
- the antenna according to the invention inexpensively opens up the possibility of creating a universal antenna, in particular for satellite reception, which can be in any position, i.e. arranged in an aesthetically satisfactory manner, aligned to a satellite to be received and can be switched to different forms of polarization with simple means.
- FIGS. 7 and 8 show examples of the binary tree structure and the arrangement of phase-shifting “pull-out lines”.
- FIG. 7 shows an arrangement in which the individual antenna elements are symbolized by circles 12, while the phase-shifting elements 25 of the first shell and 35 of the second shell are indicated by corresponding U-shaped pieces.
- FIG. 7 further shows the circular boundary of the antenna plane, which favors a rotation about the vertical axis — perpendicular to the plane of the drawing in FIG. 7.
- FIG. 8 shows, by way of example in a similar symbolic representation, conceivable matrices or binary tree structures for 2x2 antenna elements, 4x4, 8x8 and 16x16 antenna elements.
- the size of the matrix of antenna elements can be chosen arbitrarily, preference being given to square arrangements.
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742090A DE19742090A1 (de) | 1997-09-24 | 1997-09-24 | Ebene Mikrowellenantenne |
DE19742090 | 1997-09-24 | ||
PCT/DE1998/001375 WO1999016148A1 (de) | 1997-09-24 | 1998-05-19 | Ebene mikrowellenantenne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1012906A1 true EP1012906A1 (de) | 2000-06-28 |
EP1012906B1 EP1012906B1 (de) | 2001-11-14 |
Family
ID=7843441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98934748A Expired - Lifetime EP1012906B1 (de) | 1997-09-24 | 1998-05-19 | Ebene mikrowellenantenne |
Country Status (6)
Country | Link |
---|---|
US (1) | US6246370B1 (de) |
EP (1) | EP1012906B1 (de) |
JP (1) | JP4021617B2 (de) |
CN (1) | CN1156053C (de) |
DE (2) | DE19742090A1 (de) |
WO (1) | WO1999016148A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6989797B2 (en) * | 1998-09-21 | 2006-01-24 | Ipr Licensing, Inc. | Adaptive antenna for use in wireless communication systems |
JP2000196329A (ja) * | 1998-12-24 | 2000-07-14 | Nec Corp | フェーズドアレイアンテナおよびその製造方法 |
ES2231557T3 (es) * | 2000-08-31 | 2005-05-16 | Raytheon Company | Antena de sistema de elementos orientable mecanicamente. |
DE10052748A1 (de) * | 2000-10-25 | 2002-05-29 | Technisat Elektronik Thueringe | Planarantenne mit verbesserter Richtcharakteristik |
WO2002103846A1 (en) * | 2001-06-15 | 2002-12-27 | E-Tenna Corporation | Aperture antenna having a high-impedance backing |
US7233217B2 (en) * | 2001-08-23 | 2007-06-19 | Andrew Corporation | Microstrip phase shifter |
US6707348B2 (en) | 2002-04-23 | 2004-03-16 | Xytrans, Inc. | Microstrip-to-waveguide power combiner for radio frequency power combining |
JP4227589B2 (ja) * | 2004-12-03 | 2009-02-18 | 日本放送協会 | アクティブアレイアンテナ |
US7557675B2 (en) * | 2005-03-22 | 2009-07-07 | Radiacion Y Microondas, S.A. | Broad band mechanical phase shifter |
US7592963B2 (en) * | 2006-09-29 | 2009-09-22 | Intel Corporation | Multi-band slot resonating ring antenna |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63296402A (ja) * | 1987-05-27 | 1988-12-02 | Mitsubishi Electric Corp | 平面アンテナ |
FR2662026B1 (fr) * | 1990-05-11 | 1992-07-10 | Thomson Csf | Antenne orientable plane, fonctionnant en micro-ondes. |
GB2261771B (en) * | 1991-11-20 | 1995-08-30 | Northern Telecom Ltd | Flat plate antenna |
US5936579A (en) * | 1994-06-09 | 1999-08-10 | Zakrytoe Aktsionernoe Obschestvo Flant | Planar antenna array and microstrip radiating element for planar antenna array |
SE9603565D0 (sv) * | 1996-05-13 | 1996-09-30 | Allgon Ab | Flat antenna |
CA2241128A1 (en) * | 1997-06-30 | 1998-12-30 | Sony International (Europe) Gmbh | Wide band printed phase array antenna for microwave and mm-wave applications |
-
1997
- 1997-09-24 DE DE19742090A patent/DE19742090A1/de not_active Withdrawn
-
1998
- 1998-05-19 DE DE59802170T patent/DE59802170D1/de not_active Expired - Lifetime
- 1998-05-19 US US09/509,335 patent/US6246370B1/en not_active Expired - Lifetime
- 1998-05-19 CN CNB988094061A patent/CN1156053C/zh not_active Expired - Fee Related
- 1998-05-19 WO PCT/DE1998/001375 patent/WO1999016148A1/de active IP Right Grant
- 1998-05-19 EP EP98934748A patent/EP1012906B1/de not_active Expired - Lifetime
- 1998-05-19 JP JP2000513340A patent/JP4021617B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9916148A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1156053C (zh) | 2004-06-30 |
DE19742090A1 (de) | 1999-03-25 |
JP4021617B2 (ja) | 2007-12-12 |
JP2001517882A (ja) | 2001-10-09 |
US6246370B1 (en) | 2001-06-12 |
EP1012906B1 (de) | 2001-11-14 |
CN1271469A (zh) | 2000-10-25 |
WO1999016148A1 (de) | 1999-04-01 |
DE59802170D1 (de) | 2001-12-20 |
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